diff options
| -rw-r--r-- | Makefile | 23 | ||||
| -rw-r--r-- | contrib/spec/podman.spec.in | 1 | ||||
| -rw-r--r-- | pause/pause.c | 69 |
3 files changed, 89 insertions, 4 deletions
@@ -185,6 +185,10 @@ ifdef HOMEBREW_PREFIX endif endif +# For building pause/pause.c +GCC ?= gcc +PAUSE_CFLAGS = -Os -static -Wall -Werror -DVERSION=v$(RELEASE_VERSION) + ### ### Primary entry-point targets ### @@ -196,7 +200,7 @@ default: all all: binaries docs .PHONY: binaries -binaries: podman podman-remote rootlessport ## Build podman, podman-remote and rootlessport binaries +binaries: podman podman-remote rootlessport pause # Extract text following double-# for targets, as their description for # the `help` target. Otherwise These simple-substitutions are resolved @@ -374,6 +378,12 @@ bin/rootlessport: .gopathok $(SOURCES) go.mod go.sum .PHONY: rootlessport rootlessport: bin/rootlessport +bin/pause: pause/pause.c + $(GCC) $(PAUSE_CFLAGS) pause/pause.c -o bin/pause + +.PHONY: pause +pause: bin/pause + ### ### Secondary binary-build targets ### @@ -733,7 +743,7 @@ install.remote-nobuild: install.remote: podman-remote install.remote-nobuild .PHONY: install.bin-nobuild -install.bin-nobuild: +install.bin-nobuild: install.pause install ${SELINUXOPT} -d -m 755 $(DESTDIR)$(BINDIR) install ${SELINUXOPT} -m 755 bin/podman $(DESTDIR)$(BINDIR)/podman test -z "${SELINUXOPT}" || chcon --verbose --reference=$(DESTDIR)$(BINDIR)/podman bin/podman @@ -787,8 +797,10 @@ install.docker-docs-nobuild: .PHONY: install.docker-docs install.docker-docs: docker-docs install.docker-docs-nobuild -.PHONY: install.docker-full -install.docker-full: install.docker install.docker-docs +.PHONY: install.pause +install.pause: pause + install ${SELINUXOPT} -m 755 -d $(DESTDIR)$(LIBEXECPODMAN)/pause + install ${SELINUXOPT} -m 755 bin/pause $(DESTDIR)$(LIBEXECPODMAN)/pause/pause .PHONY: install.systemd ifneq (,$(findstring systemd,$(BUILDTAGS))) @@ -819,6 +831,9 @@ else install.systemd: endif +.PHONY: install.pause +install.pause: pause + .PHONY: install.tools install.tools: .install.goimports .install.gitvalidation .install.md2man .install.ginkgo .install.golangci-lint .install.bats ## Install needed tools diff --git a/contrib/spec/podman.spec.in b/contrib/spec/podman.spec.in index 295a953ef..2db8f6e67 100644 --- a/contrib/spec/podman.spec.in +++ b/contrib/spec/podman.spec.in @@ -528,6 +528,7 @@ export GOPATH=%{buildroot}/%{gopath}:$(pwd)/vendor:%{gopath} %{_usr}/lib/tmpfiles.d/podman.conf %dir %{_libexecdir}/%{name} %{_libexecdir}/%{name}/rootlessport +%{_libexecdir}/%{name}/pause/pause %if 0%{?with_devel} %files -n libpod-devel -f devel.file-list diff --git a/pause/pause.c b/pause/pause.c new file mode 100644 index 000000000..1e363bd7a --- /dev/null +++ b/pause/pause.c @@ -0,0 +1,69 @@ +/* +Copyright 2016 The Kubernetes Authors. +Copyright 2021 The Podman Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <unistd.h> + +#define STRINGIFY(x) #x +#define VERSION_STRING(x) STRINGIFY(x) + +#ifndef VERSION +#define VERSION HEAD +#endif + +static void sigdown(int signo) { + psignal(signo, "Shutting down, got signal"); + exit(0); +} + +static void sigreap(int signo) { + while (waitpid(-1, NULL, WNOHANG) > 0) + ; +} + +int main(int argc, char **argv) { + int i; + for (i = 1; i < argc; ++i) { + if (!strcasecmp(argv[i], "-v")) { + printf("pause.c %s\n", VERSION_STRING(VERSION)); + return 0; + } + } + + if (getpid() != 1) + /* Not an error because pause sees use outside of infra containers. */ + fprintf(stderr, "Warning: pause should be the first process\n"); + + if (sigaction(SIGINT, &(struct sigaction){.sa_handler = sigdown}, NULL) < 0) + return 1; + if (sigaction(SIGTERM, &(struct sigaction){.sa_handler = sigdown}, NULL) < 0) + return 2; + if (sigaction(SIGCHLD, &(struct sigaction){.sa_handler = sigreap, + .sa_flags = SA_NOCLDSTOP}, + NULL) < 0) + return 3; + + for (;;) + pause(); + fprintf(stderr, "Error: infinite loop terminated\n"); + return 42; +} |